[projmgr] Set target-set specific tmpdir as default

[brondani]

Fixes

• Changing target/build type should keep out directory vscode-cmsis-solution#102 (comment)
• [Bug]: $TargetSet$ access sequence not documented cmsis-toolbox#633

Changes

Set a target-set specific default for build index tmpdir when an active target is selected.
This aligns default tmpdir behavior with active target context and avoids collisions across target sets.

• Updated tmpdir defaulting logic in ProjMgr worker:
  • If active target type is present and tmpdir is not explicitly set, use target-specific default path.
  • If tmpdir is explicitly set, still expand target access sequences as before.
  • Final tmpdir remains rooted at solution/output base path.
• Updated reference outputs for scenarios now expected to generate target-specific tmpdir.
• Added a new unit test covering default tmpdir behavior with an active target selection.

Checklist

• 🤖 This change is covered by unit tests (if applicable).
• 🤹 Manual testing has been performed (if necessary).
• 🛡️ Security impacts have been considered (if relevant).
• 📖 Documentation updates are complete (if required).
• 🧠 Third-party dependencies and TPIP updated (if required).

[Copilot]

Pull request overview

This PR updates ProjMgr’s tmpdir defaulting so that when an active target is selected, the build index tmpdir defaults to a target-type/target-set–specific subdirectory to avoid collisions across target sets.

Changes:

• Updated ProjMgrWorker::UpdateTmpDir() to default tmpdir to tmp/<TargetType>/<TargetSet> when an active target is present, while still expanding target access sequences for explicitly configured tmpdir values.
• Updated expected/reference .cbuild-idx.yml outputs to reflect the new default tmpdir shape (e.g., tmp/CM0/default).
• Added a unit test and a new .csolution.yml input covering the default tmpdir behavior with an active target selection.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tools/projmgr/src/ProjMgrWorker.cpp	Implements the new target-set–specific tmpdir defaulting logic when an active target is present.
tools/projmgr/test/src/ProjMgrUnitTests.cpp	Adds a unit test validating the new default tmpdir behavior under --active.
tools/projmgr/test/data/TestSolution/tmpdir-default-active.csolution.yml	Adds a minimal solution input for the new unit test scenario.
tools/projmgr/test/data/WestSupport/ref/solution.cbuild-idx.yml	Updates reference output to the new tmpdir default for CM0/default.
tools/projmgr/test/data/ImageOnly/ref/image-only.cbuild-idx.yml	Updates reference output to the new tmpdir default for CM0/default in image-only mode.

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[github-actions]

Test Results

    3 files     21 suites   18m 19s ⏱️
  474 tests   474 ✅ 0 💤 0 ❌
1 422 runs  1 422 ✅ 0 💤 0 ❌

Results for commit 66ecf02.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.29%. Comparing base (5c2482f) to head (66ecf02).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2508   +/-   ##
=======================================
  Coverage   65.29%   65.29%           
=======================================
  Files         147      147           
  Lines       26702    26702           
  Branches    16184    16184           
=======================================
+ Hits        17434    17435    +1     
  Misses       7073     7073           
+ Partials     2195     2194    -1     

Flag	Coverage Δ
projmgr-cov	88.00% <100.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
tools/projmgr/src/ProjMgrWorker.cpp	87.50% <100.00%> (+0.02%)	⬆️

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[edriouk]

LGTM